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Nonlinear Finite Element Analysis of Steel Frame Column in Fire

Author: GuoFeng
Tutor: DingYang
School: Tianjin University
Course: Structural Engineering
Keywords: Steel Structure Fire resistant design H-type steel column Fire resistance Stress redistribution Local buckling Seismic damage model
CLC: TU391
Type: Master's thesis
Year: 2005
Downloads: 229
Quote: 3
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Abstract


Fire resistance is a fatal weakness of the steel structure , the sharp decline of the steel strength, elastic modulus mechanical properties at high temperatures , fire steel structure there is serious damage may occur even overall collapse prematurely . Domestic steel fire resistant design fire resistance design based on the components of the test method , this method is difficult to simulate the load of the components in the overall structure of the distribution , size, and the impact of the end constraints . If determined by calculating the ultimate bearing capacity of the steel structure of anti- fire , it may be more reasonable to determine the fire protection of steel structures . Therefore , fire resistant design method based on the calculation of the steel structure for in-depth study has important theoretical significance and practical value . Based on some of the problems that exist in the steel structure fire resistant design to complete the following work . The finite element method analysis of the impact of the fire by the fire in the beam thrust of the fire resistance of fire H-type steel columns ; consider the impact caused by the fire inside the structure due to the pillar of fire material properties change as well as the internal forces change in stress redistribution , calculated the column axis force and moment changes in the fire , and fire resistant design method based on the calculation of the axial force moment calculations ; steel frame column solid model , the effects of a fire in the steel the the frame column local buckling phenomenon , and H-type steel columns of different slenderness ratio of local buckling analysis and found that the the slenderness ratio changes will affect the deformation in the form of H-type steel columns in fire ; earthquake damage model of the steel framework , study a different earthquake damage column fire resistance of the steel framework .

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